Jürgen Ligi Jürgen Ligi is an Estonian politician. is an Estonian politician. Ligi is a former Minister of Foreign Affairs, and a member and the Vice-Chairman of the liberal Reform Party. He was Minister of Education and Research in Taavi Rõivas Taavi Rõivas is an Estonian politician, former Prime Minister of Estonia from 2014 to 2016 and former leader of the Reform Party. ' cabinet from 9 April 2015 to 12 September 2016. Previously, he served as the Minister of Defence from 2005 to 2007 and as the Minister of Finance from 2009 to 2014.